In the first ot two documentaries examining the predicament of Britain's immigrant communities, the film looks at the secret world of the illegal immigrant. The report exposes the organised crime behind the trade together with the appalling living conditions with which the immigrants are faced and their exploitation in the workplace. For six months, a team of four undercover reporters lived as illegal immigrants, joining gangs of Albanians exploited in the building trade, being attacked by racists, and working long hours for low pay in London hotels and restaurants. The programme also reveals the plight of asylum seekers in the north of England, where, having been placed in cold and inadequate flats on housing estates where they are continually threatened by racist gangs, large numbers are leaving the accommodation and are vanishing from the system. Contributors include Martin Slade of the Immigration Service Union and Lord Desai.